Introduction
Good morning everyone! Today, we are going to learn about a very important concept in Mathematics - One Less.
Objective
By the end of this lesson, you will be able to understand the concept of One Less and apply it to solve simple mathematical problems.
Engage
Let's start by playing a game! I will show you a picture of some objects and you tell me how many there are in total.
(Ask the students to count the apples)
Great job! There are 5 apples in this picture.
Explore
Now let's learn about One Less. When we take away one apple from this picture, how many apples will be left?
(Ask the students to guess)
That's right! If we take away one apple, we will be left with 4 apples.
Explain
This concept is called One Less. It means that we take away one from a number and get a new number that is smaller by one. Let me show you.
If we have 5 and we take away 1, we get 4.
5 - 1 = 4
Elaborate
Let's practice this concept with some more examples. I will show you some pictures and you tell me the answer when we take away one object.
(Ask the students to guess)
That's right! If we take away one balloon, we will be left with 2 balloons.
Now let's try another one.
(Ask the students to guess)
That's correct! If we take away one bird, we will be left with 0 birds.
Evaluate
Let's do a worksheet to see if you have understood the concept of One Less.
(Hand out worksheets to the students)
Conclusion
Great job everyone! Today we learned about the concept of One Less. Remember, when we take away one from a number, we get a new number that is smaller by one. Keep practicing and you will become a Math expert in no time!